Well a few weeks ago running WOT with my SRL I noticed my truck would puke. Fast forward a week got a new degas cap. Still didnt help. Well since with the tunes my SRL shuts the EGR valve off I've ran it for a week just stock and today decided to take the valve out and see if it was damp in there. Holy cow! Why would anyone think that putting exhaust/ soot straight back into your intake would be a good idea? I understand the idea, and maybe on a gasser it may not be bad, but wow. Just looking at the bottom of my intake and scraping it with a screwdriver made my sick. As for my findings, I dont know what good can really look like in one of these things but, it wasnt damp, but there did seem to be moisture. I took out a chunk from the bottom of the intake and squeezed it and it just turned to sticky goo. Same for the soot on the valve itself. And being that I live in grand ol California, EGR delete is outta the question. As for my findings what do you all think could be going on? I dont get puking with the truck stock, just a tune and a new degas cap didnt help. Is there anything else I can check to see if its an egr cooler or head bolt problems. ( I wish it was head bots so my warranty could fix it, I have APR's waiting as for unfortunate day).

2006 F-350 CCSB Lariat

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Thats what I have right now, I did the same thing as Smokersteve and I left a 1/4in hole in it to keep just enough flow so it wouldnt throw a code (didnt help though). Next time I take it out Im just gonna plug it 100%. I wont do that though til I figure out what my issue is.

2006 F-350 CCSB Lariat

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If you ever come across a quick and easy way to nail down which it is for sure - please post it up. Lots of folks would like to see that one! As of now, I know quite a few Techs and none will tell you that it can be done for certain without the vacuum / pressure testing. No doubt that some things will give you better indications of one vs the other, but still not 100%. Of course the conservative thing to do is to go after your headgaskets (and address both possibilities).

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